package com.jt.service;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.jt.mapper.UserMapper;
import com.jt.pojo.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Service
public class UserServiceImpl implements UserService{

    private static Map<Integer,String> paramMap = new HashMap<>();
    static {
        paramMap.put(1,"username");
        paramMap.put(2,"phone");
        paramMap.put(3,"email");
    }

    @Autowired
    private UserMapper userMapper;

    @Override
    public List<User> findUser() {
        return userMapper.selectList(null);
    }

    /**
     * JSONP跨域模式
     *  校验数据是否存在即可.查询总记录数即可
     * @param param 需要校验的数据
     * @param type  校验的类型1username  2phone  3email
     * @return
     */
    @Override
    public Boolean checkUser(String param, Integer type) {
        String column = paramMap.get(type);
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq(column,param);
        Boolean flag = userMapper.selectCount(queryWrapper)>0?true:false;
        return flag;
    }

    @Override
    public User findUserById(Long userId) {
        return userMapper.selectById(userId);
    }
}
